You should have received 2 codes. A registration code and a beta code. Below the beta code here are the instructions.
Instructions for using your Promotion Code:
Step 1: Connect the PlayStation®3 system to a broadband connection
Step 2: Sign in to your Sony Entertainment Network account on PlayStation®3
If you do not have an SEN account, please register for one (more information on www.playstation.com)
Step 3: Choose Account Management>Redeem Codes
Step 4: Select Redeem Promotion Code - this brings up a screen to enter the code you have received
Step 5: Enter code and follow the steps on screen to redeem content
*Terms and conditions apply. Please visit http://us.playstation.com/support/termsofservice/index.htm
to view full PlayStation®Network terms and conditions.
Details on how to install the Beta on your PlayStation®3 console can be found here
Click where it says here and it will bring you to the instructions to install.
FINAL FANTASY XIV: A Realm Reborn (Beta Version)
For those who have been asked to participate in the Beta test by using PlayStation 3, please follow the instruction to enter the promotion code that has been sent via email and download the test client (PlayStation 3 version).
•How to download from PlayStation®Store
1.Select "PlayStation®Store" icon located under "PlayStation®Network" category on XMB™ (XrossMediaBar).
2.Select "Redeem Codes" on the PlayStation Store menu and enter the promotion code you received in email. Once the promotion code has been entered, move on with the test client download process.
•How to download from Account Management
1.Log in to PlayStation Network.
2.Select "Account Management" icon located under "PlayStation®Network" category on XMB™ (XrossMediaBar).
3.Select "Redeem Codes.
4.Enter the promotion code and move on with the test client download process.
Once the download is complete, the software installation will begin automatically. If you select "Download in Background," you will return to XMB™. By selecting "FINAL FANTASY XIV: A Realm Reborn (Beta version)" icon located under "Game" category, the test client installation will begin. The installation will take several minutes to complete